Place the pieces, clear the lines.
Three pieces are offered at a time. Tap one, then tap where it should go — a ghost preview shows exactly what will be placed before you commit. Clear a row or column by filling it completely; the board fills up fast if you don't keep clearing.
Block Drop is a 10×10 block-placement puzzle with 19 original piece shapes and no rotations to think about — what you see is what you place. Clearing more than one line at once scores a growing bonus, which rewards planning ahead instead of placing the first piece that fits.
A watch-an-ad undo gives you one way back from a placement you regret, and the board autosaves after every move so a run picks up right where you left it.